66948340 has 12 divisors (see below), whose sum is σ = 140591556. Its totient is φ = 26779328.

The previous prime is 66948317. The next prime is 66948353. The reversal of 66948340 is 4384966.

It can be written as a sum of positive squares in 2 ways, for example, as 42068196 + 24880144 = 6486^2 + 4988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66948293 and 66948302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673689 + ... + 1673728.

It is an arithmetic number, because the mean of its divisors is an integer number (11715963).

Almost surely, 2^66948340 is an apocalyptic number.

It is an amenable number.

66948340 is an abundant number, since it is smaller than the sum of its proper divisors (73643216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66948340 is a wasteful number, since it uses less digits than its factorization.

66948340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347426 (or 3347424 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 66948340 is about 8182.1965266058. The cubic root of 66948340 is about 406.0503953556.

The spelling of 66948340 in words is "sixty-six million, nine hundred forty-eight thousand, three hundred forty".